package com.nowcoder.community.controller;/**
 * 功能描述
 *
 * @author 21775
 * @date 2022/09/14  21:59
 */

import com.google.code.kaptcha.Producer;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.service.UserService;
import com.nowcoder.community.utils.CommunityConstUtil;
import com.nowcoder.community.utils.CommunityUtil;
import com.nowcoder.community.utils.CookieUtil;
import com.nowcoder.community.utils.RedisKeyUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 *@ClassName LoginController
 *@Description TODO 登录注册
 *@Author 21775
 *@Date 2022/9/14 21:59
 *@Version 1.0
 */
@Controller
@Slf4j
public class LoginController {
    @Resource
    private UserService userService;

    @Resource
    private Producer kaptchaProducer;

    @Resource
    private RedisTemplate redisTemplate;

    @GetMapping("/register")
    public String getRegisterPage(){
        return "/site/register";
    }

    @RequestMapping(path = "/login", method = RequestMethod.GET)
    public String getLoginPage() {
        return "/site/login";
    }

    @Value("${server.servlet.context-path}")
    private String contextPath;

    @RequestMapping(path = "/register", method = RequestMethod.POST)
    public String register(Model model, User user) {
        Map<String, Object> map = userService.register(user);
        if (map == null || map.isEmpty()) {
            model.addAttribute("msg", "注册成功,我们已经向您的邮箱发送了一封激活邮件,请尽快激活!");
            model.addAttribute("target", "/index");
            return "/site/operate-result";
        } else {
            model.addAttribute("usernameMsg", map.get("usernameMsg"));
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            model.addAttribute("emailMsg", map.get("emailMsg"));
            return "/site/register";
        }
    }

    // http://localhost:8080/community/activation/101/code
    @RequestMapping(path = "/activation/{userId}/{code}", method = RequestMethod.GET)
    public String activation(Model model, @PathVariable("userId") int userId, @PathVariable("code") String code) {
        int result = userService.activation(userId, code);
        if (result == CommunityConstUtil.ACTIVATION_SUCCESS) {
            model.addAttribute("msg", "激活成功,您的账号已经可以正常使用了!");
            model.addAttribute("target", "/login");
        } else if (result == CommunityConstUtil.ACTIVATION_REPEAT) {
            model.addAttribute("msg", "无效操作,该账号已经激活过了!");
            model.addAttribute("target", "/index");
        } else {
            model.addAttribute("msg", "激活失败,您提供的激活码不正确!");
            model.addAttribute("target", "/index");
        }
        return "/site/operate-result";
    }

    @GetMapping("/kaptcha")
    public void getKaptcha(HttpServletResponse response, HttpSession session){
        String text=kaptchaProducer.createText();
        BufferedImage image=kaptchaProducer.createImage(text);

//        session.setAttribute("kaptcha",text);
        String kaptchaOwner= CommunityUtil.getUUID();
        Cookie cookie=new Cookie("kaptchaOwner",kaptchaOwner);
        cookie.setMaxAge(60);
        cookie.setPath(contextPath);
        response.addCookie(cookie);

        String redisKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
        redisTemplate.opsForValue().set(redisKey, text, 60, TimeUnit.SECONDS);

        // 将突图片输出给浏览器
        response.setContentType("image/png");

        try {
            OutputStream outputStream=response.getOutputStream();
            ImageIO.write(image,"png",outputStream);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @PostMapping("/login")
    public String login(String username,String password,String code,boolean rememberme,
                        Model model,HttpServletResponse response,@CookieValue("kaptchaOwner") String kaptchaOwner){
        //验证验证码
        String kaptcha = null;
        if (StringUtils.isNotBlank(kaptchaOwner)) {
            String redisKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
            kaptcha = (String) redisTemplate.opsForValue().get(redisKey);
        }
        if(StringUtils.isBlank(kaptcha)||StringUtils.isBlank(code)||!kaptcha.equals(code)){
            model.addAttribute("codeMsg","验证码不正确");
            return "/site/login";
        }
        //验证密码
        int expiredSeconds=rememberme?CommunityConstUtil.REMEMBER_EXPIRED_SECONDS:CommunityConstUtil.DEFAULT_EXPIRED_SECONDS;
//        log.info("---------------->"+expiredSeconds);
        Map<String,Object> map=userService.login(username,password,expiredSeconds);
        if(map.containsKey("ticket")){
            Cookie cookie=new Cookie("ticket",map.get("ticket").toString());
            cookie.setPath(contextPath);
            cookie.setMaxAge(expiredSeconds);
            response.addCookie(cookie);
            return "redirect:/index";
        }else{
            model.addAttribute("usernameMsg", map.get("usernameMsg"));
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            return "/site/login";
        }
    }

    @GetMapping("/logout")
    public String logout(@CookieValue("ticket") String ticket){
        userService.logout(ticket);
        SecurityContextHolder.clearContext();
        return "redirect:/login";
    }
}
